fix: common string patterns

Author: SKairinos

src/schemas/user.ts

@@ -1,6 +1,3 @@
-import * as yup from "yup"
+import { alphaString } from "../utils/schema"
 
-export const firstNameSchema = yup
-  .string()
-  .max(150)
-  .matches(/^[a-zA-Z]*$/, "can only contain only letters characters")
+export const firstNameSchema = alphaString().max(150)

src/utils/schema.ts

@@ -9,6 +9,8 @@ import {
   type Schema,
   type TypeFromShape,
   type ValidateOptions,
+  type StringSchema,
+  string as YupString,
 } from "yup"
 
 export type _<T> = T extends {}
@@ -30,6 +32,54 @@ export type ObjectSchemaFromShape<Shape extends ObjectShape> = ObjectSchema<
   ""
 >
 
+// -----------------------------------------------------------------------------
+// Limited Character Sets
+// -----------------------------------------------------------------------------
+
+export function limitCharSet(
+  charSet: string,
+  message: string,
+  schema: StringSchema = YupString(),
+) {
+  return schema.matches(new RegExp(`^[${charSet}]*$`), message)
+}
+
+export function alphaString(schema: StringSchema = YupString()) {
+  return limitCharSet(
+    "a-zA-Z",
+    "can only contain alpha characters (a-z, A-Z)",
+    schema,
+  )
+}
+
+export function lowercaseAlphaString(schema: StringSchema = YupString()) {
+  return limitCharSet(
+    "a-z",
+    "can only contain lowercase alpha characters (a-z)",
+    schema,
+  )
+}
+
+export function uppercaseAlphaString(schema: StringSchema = YupString()) {
+  return limitCharSet(
+    "A-Z",
+    "can only contain uppercase alpha characters (A-Z)",
+    schema,
+  )
+}
+
+export function numericString(schema: StringSchema = YupString()) {
+  return limitCharSet("0-9", "can only contain numbers (0-9)", schema)
+}
+
+export function alphanumericString(schema: StringSchema = YupString()) {
+  return limitCharSet(
+    "a-zA-Z0-9",
+    "can only contain alphanumeric characters (a-z, A-Z, 0-9)",
+    schema,
+  )
+}
+
 // -----------------------------------------------------------------------------
 // Try Validate Sync
 // -----------------------------------------------------------------------------